| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.79 | USD | 20250814 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.56 | USD | 20250813 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.38 | USD | 20250812 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.61 | USD | 20250811 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.01 | USD | 20250809 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.01 | USD | 20250808 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.65 | USD | 20250807 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.54 | USD | 20250806 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1237.28 | USD | 20250805 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1236.78 | USD | 20250804 |